Can SIP benefit from HIP (or vice versa)?Exchanging Host Identities in SIP

<draft-tschofenig-hiprg-host-identities-00.txt>

Hannes Tschofenig, Vesa Torvinen, Joerg Ott, Henning Schulzrinne, Tom Henderson, Gonzalo Camarillo

Scope

SIP / RTP

Proxy

SIPSIP

SIP

Signaling Traffic — Securing SIP signaling using HIP— Traversing NATs/Firewalls located between SIP proxies using

HIP— Exchanging Host Identities in SIP between the end points— Using HITs instead of IP addresses or FQDNs in SIP/SDP

Data Traffic— Securing the end-to-end communication via HIP (using IPsec or

???)— E2E NAT/Firewall traversal— Multi-homing and mobility capabilities

SIP Trapezoid

Proxy

Draft ContentExchanging Host Identities in SIP

Host Identities / Host Identity Tags are exchanged in HIP (via SIP hops)

End-to-end communication experiences HIP benefits Host Identities can be tight to the SIP URIs Cached locally at the end host (for future communication) "Purpose-Built-Key Idea"

HIP Exchange

Proxy

SIPSIP

SIP

Proxy

HIT/HI

Alice BobRTP (SIP,...)

HIT/HIHIT/HI

Next Steps

Investigating the details— Draft mentions the usefulness of replacing IP

addresses with Host Identities. Implementation work